A long journey needs its milestones

Now the tactical objectives
of our improvements efforts are at last clearly defined; we need to implement
the injections.Simply the future
reality tree has logically shown that once the injections are implemented the
desired outcome all the strategic objectives will be accomplished.

Implementing the injections
if not a trivial task.Lets not
forget that at lest one of the injections is a breakthrough a departure from the
current prevailing tradition. Thus it is usually necessary to break the
implementation task into smaller increments.

For this we use the
prerequisites tree.Starting with
the obstacles that we expect we’ll encounter the necessary milestones – the
intermediate objectives are verbalised.Each
obstacle gives rise to an intermediate objective one we assess will be
sufficient to overcome the corresponding obstacle.

To complete this step the
intermediate objectives need to be sequenced, i.e.: which one is first, which ones
can be accomplished n parallel etc. The connections are provided by the fact
that any time dependency is due to the need to overcome an obstacle.

The power of the prerequisite
tree stems from the fact that it doesn’t ignore the obstacles, on the contrary
they are used as the main vehicle for this entire setup.